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Tapers
None Bottom Tapers Dual Tapers
S
traight tubes used in split
injection with autosamplers.
• Directs sample onto head
of column and limits analyte
e
xposure to bottom of inlet.
• M
inimizes decomposition
and discrimination.
• Contain sample within glass
liner limiting contact with
m
etal inlet surface.
• T
hought to limit loss through
septum purge.
Glass Wool
• Less discrimination.
• Provides additional surface area for sample vaporization, increasing reproducibility.
• Serves as a trap for non-volatiles.
For split liners, Agilent specifies the placement of glass wool in the liner so that the
syringe penetrates the glass wool, wiping the syringe, to provide the most repeatable
results with Agilent autosampler and split/splitless inlet design thermal profile.
Even though it is deactivated, glass wool is considered the most active component
of a liner, increasing the possibility of adsportion and sample decomposition of
active compounds.
Liners with glass wool are not recommended for samples with active analytes – such as
phenols, amines, organic acids, pesticides and drugs of abuse – that could be irreversibly
adsorbed on surfaces in the inlet.
Deactivation
Agilent's proprietary deactivation is more resilient to degradation than other commercial
processes. With use, even deactivated liners become active. Replace the liner regularly.
Splitless liner
, double taper
, 5181-3315
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